Boiler construction



Jan. 3, 1928. l

G- A. coLLlNs 1654791 BOILER CONSTRUCTION 1N VEN TOR.

y an. cau/VJ ATTORNEY.

Jan. 3, 1928. 1,654,791

G. A. coLLlNs BOILER CONSTRUCTION Fileduuly 21, 1924 2 sheets-snee: 2

00009060 ooooooo O G0900 ooo oo [y ooooo oo INVENTOR.

62/7, CWZ//YJ A TTORN E Y.

Patented Jan. 3, 1928. i

UNITED STAT PAT-ENT OFFICE.-

CTLENVILLE'A. COLLINS, OF LOS ANGELES, CALIFORNIA, ASSIGNOR TO SOUTHWESTERN ENGINEERING CORPORATION, OF LOS ANGELES, CALIFORNIA, A CORPORATION OF DELAWARE kisolare CONSTRUCTION.)

y Applcationiled July 21, 1924. Serial No. 7W-7,196.

y This invention relates to boilers.

l The general objectqoi''the invention is to provide kan improved boiler of the wat-er tube type One of the specic objects of the invention is to provide a water'tube boiler, including curved tubes and a transverse drum, with a water leg.

A further objectv of the invention is toV io provide a boiler, including water tubes and steam and water drums, with means whereby steamv entering the water legvcan be taken oft' in the drums thereby permitting the'circulation to continue around the circuit of the l5 boiler. p

An additional object of the invention is to provide a boiler including a pair of disengaging drums Vtogether with means whereby steam maybe ,taken from one drum,

superheated and conducted to the other disengaging drum where the superheated steam mixes with the 'saturated`steam, thus causing an equalizing oit temperatures and affording a steam carrying a desired degree of superheat. i

An additional object of the invention is to provide a Ywater tube boiler with a'rwater leg which is preferably rectangular7 together with a connecting member of novel 'form for connecting vthe water legi-'with a Vcylindrical drum; Y

' A further objectofthe invention is toprovide` a water tube boiler with a water leg which is secured to and which aids in supporting the tubes constituting the main circulatory members of the boiler.

Another object of the invention is to provide a water tube boiler having a water leg with means for holding and supporting cir- L1o culation tubes so thatthe water land steam in the bottom bank `of tubes may have unimpeded circulation and wherein the water leg is connected with a steam and water drum so that steam'entering the 'water leg` 15 may be transferredto 'thev adjoining drum Vand there disengaged.

. A further object of the invention is to provide av water tube boiler witha water leg which is connected to adrum or cross drum` :'50 and wherein the communicating passageways between the water leg and the cross drum is defined by slots or holes in the drum thereby freely .admitting water .and steam and tending to produce disengaged steam bubbles A further object of the invention is to provide a steam boiler of the water tube type including a water leg lwherein theV water leg is connected to the cross drum with a con'- necting' member wherein the l.communicating area is composed of a plurality of sections `disconnected toy provide intervening metal whereby the strength of the drum is unimpaired by the passageway.

ings', wherein Figure a sectiompartly in elevation, showing my improved boiler; y

Fig. 2 is a frontv elevation, partly in section, rshowing the boiler;

(Fig. 3 is a fragmentary perspective view of the member for connecting the water leg with the forward cross drum;

Fig. 4 is a fragmentary bottom plan view of the forward drum showing the connecting member.; Y

Fig.-5 is a detailed elevation; andv Fig. 6 is a fragmentary perspective view ofthe battle.

Referring to the drawing by reference characters I have shown a boiler embodying the features oi. myy invention at 10. This boiler comprises a boiler setting 11 having a space 12 for a furnace therein and having a .r

breeching 14 to the smoke stack.

The boiler shown is of the water tube type and Vincludes a mud; drum 15. A pair of steam and water drums 16 and 1T are located above the mud drum. v The drums 15 and 16 are shownas connected byA banks of tubes 18. A water. leg which is preferably a rec-- vtangular metal member is shown at 19 as having parallel, front and back portions. The drumsv 15 and 16 are connected to thtK water leg 19 by banks of curved tubes 20 and 2l respectively. y

' The steam and water drum 16 is indicated as provided with a feed water pipe 22 and with a steam discharge pipe 23. The drumk 17 is shown as provided with the usual water CIJ y surging of the water.

gauge 25.

The boiler may be provided with battles 26 which maybe arranged in a manner to conduct the hot gases properly. It will be understood that the boiler is adapted for use with various types oft heat reducing devices whether it is coal, oil or rlhe arrangement of battles also may be changed to suit various conditions. p

yThe water leg 19'is shown as arranged at the ends ot the banks o t' curved tubes 2O and 21. These tubes are arranged in the rear wall 30 of the water leg and in order to afford ready access toi" cleaning and repair ot these tubes l show the front wall 31 opposite the .rear wall 30 as provided with a plurality ot lrey caps These key caps may be removed whendesired allowing` ready access to the tubes 2O and 21.

In order to connect the water leg 19 with the drum 17 I 'provide a metallic throat piece 35 which may be Aconsti-iic'ted as a single piece member, or it desired'it may be made ot a plurality of parts.

This connecting member is provided with a rectangular bottom portion 86 which may be secured to the water leg 19,V by rivets such as shown at 37. The rivets are shown as single, although they may be double and staggered, if desired. The upper portion of the connecting member 36 is shown as curved as at 38 to lit the under portion ot' the drum 17.

The Water leg is placed in'communicationr )reserving the strength of the drum and atl the same time inthe aggregate furnishing a. passageway ot large area through which the water passes thus tending to prevent surging.

The drum 17is shown as provided with a baille which is provided with apertures along the bottoni edge thereoi" Vto allow passage `ot water. The balde Ll5 extends over the "openings l0 thus aiding in preventing The drums 1G and 17 are shown as yconnected by tubes which are arranged adjacent the upper portion 51 of the boiler setting. The tubes 50 provide, vin effect, a superlieater so that the steam which is disengaged in the drum v17 and which passes through the tubes 50`is superheated during passage. The superheat'ed steam, upon leaving 4the tubes 50mingles with the saturated steam in the drum 16 thus lowering the temperature of the superheated'steam entering drum 16 and providing a steam producthaving a desired degree otsuperhe'at.

lin 'using 'any' -iinproved boiler 'it will be the upper steamV space of this drum whenceV it passes to the drum 16 through .the superh'eater 50. .After the water passes through the tubes 21 other steam is disengagedV in the drum 16 and this mingles with the steam disengaged in 17 and` which has passed through the superheater 50, as explained. v .The banks of tubes are pi'eterably ai'- rangedin rows with alternate wide and narrow spaces between the rows, as shownin the drawing. y y. l

It will lthus be seen that I provide amain water circuit 'through the drums 15' and 16 and the water leg 19 and steam i'sdisengaged in the drum 17 independently of the circuit mentioned.

W'hat I claim is: Y Y Y y 1. In a boiler, a vplurality of drums, including a mud drum, a lsteam and water drum, a bank of tubes connecting said steam and water drum and the rmud drum, awater leg, a bank of tubes connecting the water leg to the mud drum and a third bank of tubes communicating directly with the water leg and with the steam Vand Water drumto provide a water circuit, said mud drum being below said vsteam andV Water drunLa third'v drum,l said' third drum being located above the Water leg, andmeans providing Va -passageway having a cross sectional area but slightly less than the interior crossV sectional area of' the water leg for vconnecting the water leg to the third drum whereby the velocity of water ascending in the water leg is low. l

2. In a boiler, a plurality of drums, ,including a front drum, a rear mud drum and a rear steam and water drum,a bank ofV tubes connecting said steam and water drinn and the mud drum, a water leg, said water leg directly coinn'iunicating with said liront drum, a second bank oit high-angle curved tubes connecting the rear tace ofthe water leg to the muddrum, a third bank of 'tubes directly connected to the steamV and `water drum, all ol said third bank ot tubes beingv directly connected to the water'leg to provide a water circuit. n

3. In afboiler, ani'ud drum, a steam and water drum, tubes connecting said Ydru'n'is, a

water leg, a bank of tubes connecting said v water leg with each of said druins'to Lprovicle a water circuit wherein the water moves freely, a third drum, said third drum having an laperture 'thereim means ydisposed around said apei'it-ure and connecting tli'e water leg with the Athird drum 'whereby disengaged steam may ybe delivered in the third Vdrum and other tribes connecting the third drum and the first mentioned steam drum, said other .tubes being adapted 'to sirp'erli'eat steam disengaged in the third drum and direct such superheated steam to the `the see-A ond drum Where it will mingle with the,

saturated steam disengaged in the second drum to produce steam with a loiv degree of superheat, the steam disengaged in said rWatei` circuit and the steam passing ythrough v:said other tubes moving in the same direction and producing dry steam moderately superheated and With but slightV geysering action whereby a steady Water level is maintained.

4. In a boiler, a plurality of drums, including a front drum, a rear mud drum and a rear steam and Water drum, a bank of tubes connecting said steam and Water drinn and the mud drum, a Water leg, said leg having parallel front and back faces, a bank of curved tubes connecting the rear face of the AWater leg to the mud drum, bank of tubes connecting the rear face of the Water leg to the steam and Water drinn to provide a water circuit, means connecting said front drum directly with the Water leg, means spaced entirely above said third mentioned bank of tubes connecting the front drum to the rear steam and Water drum, said rear steam and Water drum having a steam outlet Y therein.

In testimony whereof, I hereunto affix my signature. v

v GLENVILLE A. COLLINS. 

